粉煤灰烘干機是煤粉經高溫燃燒后形成的一種似火山灰質混合材料。
它(ta)是燃燒煤(mei)的(de)(de)發電廠將(jiang)煤(mei)磨成(cheng)100微米以下(xia)的(de)(de)煤(mei)粉,用預(yu)熱空氣(qi)噴入(ru)爐膛(tang)經燃燒形(xing)成(cheng)懸(xuan)浮狀態,產生混雜有大量不燃物的(de)(de)高溫(wen)煙氣(qi),經集(ji)(ji)塵(chen)裝(zhuang)置捕集(ji)(ji)就得到了粉煤(mei)灰。粉煤(mei)灰的(de)(de)化(hua)學組(zu)成(cheng)與(yu)粘土(tu)質相似,主要(yao)成(cheng)分為二(er)氧化(hua)硅、三(san)氧化(hua)二(er)鋁、三(san)氧化(hua)二(er)鐵、氧化(hua)鈣和未燃盡(jin)碳(tan)。
工(gong)作原理
濕(shi)(shi)粉煤灰由供料(liao)(liao)裝(zhuang)置進(jin)(jin)入(ru)三層(ceng)(ceng)(ceng)滾(gun)筒(tong)(tong)(tong)(tong)的(de)內(nei)(nei)層(ceng)(ceng)(ceng),實現順流(liu)烘干(gan)(gan), 粉煤灰在(zai)內(nei)(nei)層(ceng)(ceng)(ceng)的(de)抄(chao)板(ban)下不(bu)斷抄(chao)起(qi)、散(san)落(luo)呈(cheng)(cheng)螺旋行進(jin)(jin)式(shi)實現熱(re)交換(huan),物(wu)(wu)料(liao)(liao)移動至(zhi)內(nei)(nei)層(ceng)(ceng)(ceng)的(de)另一端(duan)進(jin)(jin)入(ru)中(zhong)層(ceng)(ceng)(ceng),進(jin)(jin)行逆流(liu)烘干(gan)(gan),物(wu)(wu)料(liao)(liao)在(zai)中(zhong)層(ceng)(ceng)(ceng)不(bu)斷地被(bei)反(fan)復揚進(jin)(jin),呈(cheng)(cheng)進(jin)(jin)兩步退一步的(de)行進(jin)(jin)方式(shi),物(wu)(wu)料(liao)(liao)在(zai)中(zhong)層(ceng)(ceng)(ceng)既充(chong)分吸(xi)收(shou)內(nei)(nei)層(ceng)(ceng)(ceng)滾(gun)筒(tong)(tong)(tong)(tong)散(san)發(fa)的(de)熱(re)量,又吸(xi)收(shou)中(zhong)層(ceng)(ceng)(ceng)滾(gun)筒(tong)(tong)(tong)(tong)的(de)熱(re)量,同時又延長了(le)干(gan)(gan)燥(zao)時間,物(wu)(wu)料(liao)(liao)在(zai)此(ci)達(da)(da)到干(gan)(gan)燥(zao)狀態(tai)。物(wu)(wu)料(liao)(liao)行至(zhi)中(zhong)層(ceng)(ceng)(ceng)另一端(duan)而落(luo)入(ru)外(wai)層(ceng)(ceng)(ceng),物(wu)(wu)料(liao)(liao)在(zai)外(wai)層(ceng)(ceng)(ceng)滾(gun)筒(tong)(tong)(tong)(tong)內(nei)(nei)呈(cheng)(cheng)矩形(xing)多回(hui)路(lu)方式(shi)行進(jin)(jin),達(da)(da)到干(gan)(gan)燥(zao)效果(guo)的(de)物(wu)(wu)料(liao)(liao)在(zai)熱(re)風作(zuo)用下快速行進(jin)(jin)排(pai)出滾(gun)筒(tong)(tong)(tong)(tong),沒有達(da)(da)到干(gan)(gan)燥(zao)效果(guo)的(de)濕(shi)(shi)物(wu)(wu)料(liao)(liao)因自重而不(bu)能快速行進(jin)(jin),物(wu)(wu)料(liao)(liao)在(zai)此(ci)矩形(xing)抄(chao)板(ban)內(nei)(nei)進(jin)(jin)行充(chong)分干(gan)(gan)燥(zao),由此(ci)達(da)(da)到干(gan)(gan)燥(zao)效果(guo),完成干(gan)(gan)燥(zao)過程。
設備特(te)點
該(gai)設(she)備(bei)與其他干燥設(she)備(bei)相比,生產能力大(da)(da),可(ke)連續操(cao)作(zuo)(zuo); 結構簡單,操(cao)作(zuo)(zuo)方便;故(gu)障少(shao),維修費用(yong)低;適用(yong)范圍(wei)廣,流體阻力小,可(ke)以用(yong)它干燥顆料狀物料,對于那(nei)些附著(zhu)性(xing)大(da)(da)的物料也很有利(li);操(cao)作(zuo)(zuo)彈性(xing)大(da)(da),生產上允許產品的流量有較大(da)(da)波動范圍(wei),不會影響產品的質(zhi)量;清掃容(rong)易。